
import 'package:fluttertoast/fluttertoast.dart';

// 在底部显示消息
Future<Null> _showToast(msg) async{
  Fluttertoast.showToast(
    msg: msg,
    toastLength: Toast.LENGTH_SHORT,
    gravity: ToastGravity.BOTTOM,
    timeInSecForIos: 1,
  );
  return;
}